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Thread Title:

Galling??


Created On Tuesday December 18, 2012 15:15 Diesel Talk
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frliner
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Note Tuesday December 18, 2012 15:15 View thread in raw text format
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2001 W/star with a 6NZ. Took in to have overhaed ran. Picked up truck after hours. In the mechanics report this was was written "Noticed cam lobes & rollers on #2 & #3 injectors are galling" can anyone explain what "Galling" is?
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stump
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Note Tuesday December 18, 2012 15:53 View thread in raw text format
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Galling is slight wear,it kind of looks like very very fine surface cracking it can be caused by lubrication and or heat or just in the hardness or lack thereof on the cam lobes or the rollers on the rocks arms.
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frliner
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Note Tuesday December 18, 2012 16:02 View thread in raw text format
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Stump thanks for the reply. Is this something that I need to be concened about.
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JoeZ
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Note Wednesday December 19, 2012 21:34 View thread in raw text format
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Definately a worry point......galling is metal coming off the cam and rollers....metal from the cam and rollers is harder than bearing material and some will get past the filter and cause premature wear on rod and main bearings...cam bearings .......turbo..... and on and on....also as the cam and rollers wear, you lose your valve adjustment.

-------------------------
One of the last 2 Stroke mechanics left.
44 years in the business and worked on everything from 53 series to 149 series. Winding it down now...time to move on.
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frliner
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Note Friday December 28, 2012 16:34 View thread in raw text format
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frliner
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Note Friday December 28, 2012 16:36 View thread in raw text format
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What is the fix for this problem. Short term fixes and long term. Thanks for all the help!
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Brent
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Note Friday December 28, 2012 18:49 View thread in raw text format
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Change the cam shaft and rollers is about it.

Brent
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oldschooldieselguy
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Note Thursday April 23, 2015 16:18 View thread in raw text format
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Just working on a Cat 312 with the same galling on the rollers. It's time for a cam and rollers right NOW. Believe me. Do you have facebook? I can show you pics.
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